function getUrlParam(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)"); //构造一个含有目标参数的正则表达式对象
    var r = window.location.search.substr(1).match(reg);  //匹配目标参数
    if (r != null) return unescape(r[2]);
    return null; //返回参数值
}
function goodsDetail(obj) {
    var gId = $(obj).attr("gId");
    location.href = "goods.html?id=" + gId;
}